Pump and motor



May 14, 1929.

M.. A. sEAHc'L PUMP AND MOTOR Filed Dec. 9, 1926 3 Sheets Sheet I May 14-, 1929 M. A. SEAHOLM 7 1,712,935;

PUMP AND MOTOR Fil ed Dec. 9, 1926 s Shets-Sh'eet 2 u nqumw Ki V 1 2-06? @507 Wm; 1 MM f I May'14, 1929 SEAH'QLM 1,712,935

PUMP AND MOTOR Filed Dec. 9, 13 26 s Shees-Sheet 5 77 62? 2.655 W W I n 565W 1 L W 1 Mum WfM L1 J W WE;

mmmva mmaejr ee L' Q I f Applicati on'iiled inecemlieri, i9 a'." j1sera1 m 153,524. j

My invention relates re- "machine of the rotary piston typewhich may be. used either as a pumping engine,'-oras"a motor, and v convenlentl be constructed of'me'tal castreversible in "direction .of rotation. In my pending application-for patent filed Decent.

-ber 9, 1925, Serial No. 74,264,' I have de} scribed a simple and efficient. engine of this -type, and my present' inventionmay be regarded as a modification ofthe -construction therein disclosed, and having certain novel and desirable. features of'construction and; g advantages which will be apparenti rom' the I description'hereinafter given, [among which; may be mentioned that of roviding fOI' BQ. ve y .flu 1;= by the engine when functioning as aliquid ...p"ump or as-a blower directl con'nectedto a, no'zzle. ;My inventionresi es in the".n'ovlel f; construction and arrangement oftliegdifferfl ent members and p'arts'of-fthe engine relating] ;,"und' with the. side facesiof. a pair of vanes mentioned, the essential elements thereof e-f "mg moregparticularly pointed-font v i1 1- the;ap

more regular and uniform,

to the desirable features and advanta es Y pended l claims.

In the drawingsfFigure- 1i a view;v of a preferred form of my invention; Fig.

2 is a side elevationof the same; Fig. 3 i's a left end elevation of the' same; Fig, 4 is 'a ivertical section in a'plane extending axially oil-the rotor and working chamber'ofthe'engine; Figs-5 and 6 are-vertical cross-sections inplanes indicated by the dotted lines 5+5 and 66, respectively, of Figure/1', viewed in thedirection of the arrows, Figure 7 is a vertical cross-section in aplane indicated the dotted line 77fof Fig. 4, lookingiinthe opposite direction, as indicated byjthe arrow; Fi 8 is anaxial vertical'section of a modifie formof my inventionyfi sgi9 and 10 are viewscorrcsponding .to Fig. 5,

but severally showing modified-'arrange ments of 'thesliding vanes carried by the ro-.

tor member; and Fig. 11 is anaxia'l vertical.- 3 section of another modified form ofimy .rng g p I metal (pieces ofwhich .the parts aand b are vention.

Similar reference characters indicate s i i 1ar parts mall the fi ures of thedrawmgsj In the preferred orm of my'invention- "illustrated in Fi .illustrateda dou x-l rl adapted for the purpose. ofjsupplying ployed aroun 1 to 7 inclusive, I have lepump which is partiou- ,uresreferred to, the casing, which maymost ings,in clu es a base lintegralwith an an- ..nular;body member 1 arranged'to receive parts .o f-the blower mechanism, afront cover member orcap plate 2, an intermediate body'imember 3 formed witha rearward o fvariousother-uses;Describing now the particular'construction shown in the figtubular extension-3, and a rear casing membei constituting a rear end cap housing parts belongingto the oil pump. The main body member is formed with a cylindrical I.

innerlface', and the 'cap; plate 2f and interme'diatelbodyfmember S-bolted to the main member are ,respectively fformed with paraljlel side 'faces ;marked"8 and. 8.;to make a fsmooth'working fit withwhat willbe termed the end face'sof a cylindrical sleeve structureconsisting of a" ring or sleeve member 5 '6. 6":whi'ch slidingly reciprocate in a slidewayextendi'ng diametrically through a core for rotor-member 7, th'e vane 6 beingpivoted "to the ring and the two vanes being stressed "apart by:a.fspring 100. The rotor member, .for oonvenienceof manufacture, is preferably formed'in'two parts,-marked wand b,

-firmly secured'together and separable in the plane of .thevjointbetween sideface of the cap plate-2 and the main body member. The

part a is rotatably seated in a socket in said cap plate and is'formed with a journal 9 mountedin a packed bearing forming part .ofsuch. capplate or cover member, and the {part b is fo'rmedwith a cylindrical extension 9} which is journaled inthe body member 3 Q and its tubular extension 3, and which itself constitutesthe rotor member of-the smaller, for oil pum within the rear casing member 4. A -pac 'n ring 10 is preferably emthegextension 9 to prevent leakage between the two pump structures.

. It will readily be understood that the oil pump conveniently formed in the part b when it lsseparated, and-that the parts be finished asone-after' theyhave been firmlyi 3 1- the e ale-"ta.

.easing is provided with two'flow-oonne'ctions' I1 and 12 on opposite sides ofth'e'center of -jthe' machine having' vertical' passages oommunicating with horizontal cross passages.-

13 and 14, respectively, such'body mem her. The cross passage 13 commumcates at- I its opposite endswith a pair of opposite duplicate-recesses '15 and 15 formed respec-' tively-in thecap'pl'ate 2 and intermediate body member '3 ,'{which' recesses have mner arc-shaped portions, marked respectively 16 and 16%, constltiitmgifports which comuumu cafe laterally throughduplicate curvedaml tapering port openings (defined 'by the peripheral face ofthecore'or rot-or'and end gfaoes of the sleeve and "the-ends of the re-.

cesse s) with the lune shaped space between therotor and the sleeveand'the facess and 8 off'thecap plate andintermediate body The cross passage 14' communicates. in a similardnanner with the recesses 17 and 17 havingcurrent portions 18 and 18 extending in a direction-opposite .to that of the above mentioned recess portions 15 and 15 and ter- 7 points near the line of contact ofand rotor tofextreme ends which are diamet rically; opposite the entrcme'end o t the ports minating in ports or, port openings similar .to and oppositeport openings of the ports 16 and 16?. .As shownin the drawing, the

"'ports on one side of the pumpextend from the sleeve "onftheother side,

the casing walls intermediate theextreme The space between hering and rotor and ends io f the ports" constitutes the working chambertraversed by 'tlie vanes mounted in the'.rotorL,-

.-.The oil pumpioperate's in the same manner asthe blower above described, though somwhatditferently constructed. The core or rotor consists of the end of the cylindrical' extension 9 of the blower, whichv is slotted to receive the vane members 19 and 19, the former *pivoted to the ri'n "20 of the oil pump and the latter stresse apart. from the former bya spring 21. It may here be explained, however, that in rapid operation of the engine the centrifugal force-of the vanes is sufficient to keep the vane 19 in contact to the vane (S ot the blower. As before menwith thering, so that the spring is not indispensable, and the same is true with respect tioned, the'ring orsleeve 20. is. rotatably mounted in the end eap plate 41 secured to Ybody member.

the tubular extension 3" of the intermediate The intermediate member 3 of the casing is formed with flow connections '22 and 23 which, through passages in such member and opposite arcuate-parts 24and25, communicate with the lune-shaped space between the rotor and slee v e'.20, the ports and'fiow passages in, the oil pumpopening at one end of the ring only, and not being duplicatedon opposite sides, as in thecase'of the blower.

The opei'ation of mynov elump will be I read ily understood from the oregoing de seriptlon of its construction. Assuming that the low connection 12 is connected to a jet nozzle-through which air is to be forced and that the rotor'shatt is connected to a motor to drive the rotor in a counter-clockwise. di-

rection, as viewed in Figure 5, the vane will force the air ahead of it out through the port 18'until said vane-passes the lowcr endi of said port and the vane 6 cutsofl communie oatlon between the cyhnder space and the inlet port 16, after which the last mentioned vane will-in] its turn force the "air ahead of 'it through an arc of 180, while the vane 6 is also movingthrough an arc of180" and passing idly first throughfthe stream of air passing through the port 18 and then through the incoming stream of air drawn in back of the vane 6through the port16. It is manifest that the jalternate working strokes of the vanes 6 and 6 will each begin with a substantial volume of delivery Wl'llCll will first increase somewhat and then decrease through the are covered by the stroke, but will not vary greatly. I therefore attain a much greater. regularity-of flow than in the pump described in my former applica- ,tion above mentioned, in which, a single.

vane working through substantially an en-" tire circle is employed, and ,the flow rises from zero to maximum through a half revo lution of the .roto'ig'and falls from maximum to zero through the other half revolution.

.The volume of'delivery is also greater with a. pump of the same dimensions.- g

It will be understood that the=vanes 19 and 19 of the oil pump act in the same man ner as the vanes of the blower to force'oil within the cylinder space out through the flow connection 23, and draw oil in through the connection 22. It will be noted, also,

that the vanes of the blower and the vanes arranged in radial slots inthe rotor. In 4 this form of my invention the inlet ports 29 and outletports 30 (one only of each being shown) extend through arcs of? ap-' nroximately 135, so that between the ex trcme ends of the ports the working chamher of the-cylinder space extends through an. angle of about 90, thus-still further reducing the-amount of pulsation of flow, and slightly increasing, the delivery of a? pump of a given size of rotor and ring.

In Figure 10 I haver shown a further modification in whichI employ three vanes,

one vane 31 extending clear through the diametrical slot in the rotor and pivoted at 'one end to the ring or sleeve and two auxiliary spring-pressed vanes 32 and 33 approxi r gle of approximately 120",

In F'gure 8 1 have illustrated single? pump embodyingmyinvention in whichthe extended end otjthe rotor 36. is formed with peripheral gear teeth. 37'arranged to mesh with ai'pinion 38 also housed within tho ca'smg and mounted on apacked power shaft 39, the construction in other respects r'eformof my invention (the specific construc f 'tion'of which is notclaimed in and by the sembling that illustrated-in Figure 4. The power shaft 39 may bethe 'moto'rshaftof an electric motor,- the reduction-in gearin O- afforded by-the pinion 38 and gear'teeth rendering the machinewell adapted for the pumping of liquids. I

In E'gurell I have illustrated-a modified present application), in which the sleeve structure" includes. two sleeve members .or': rings marked 40 and" 11, eacli'equipped with pivoted vane-42' and cooperating with iam'etrically oppositeauxilia'ry vane 43, are" mounted in'a common ringseat,"thevanes all working in a single.diametricahslptjn the rotor extending axilallythe' entirewidth of the ring seat.- It is obvious j that .whilethe vanes remain at all timesinali'gnmentf in ca common plane each pair-of 'vanes142? and 43 with its associated-ring will rotate tending to.de'velo from the change of speed of the one will t erefore be neutralized by theother.

As in-my prior application above men{ tioned, the pivotal connection of the blades to the sleeveserves to positively actuate the latter, and the. inner'face ot'the sleeve rovides a peripheral -wall' for the wor ing chamber which travels in the same direction as the rotor and'vanes at -the'same angular Velocity. .The auxiliaryvanes,'-while they may he spring-pressed against the sleeve, have verylittle tendency to wear, as the point of contact shifts but slightly. Moreoventhe seat of the sleeve in the. casing- -has no tendency to, wear out of a true cylindrical shape, and the defect 'ot irregular wear to which'pumps employing a vane hav.-

ing a sliding contact directly upon a circularseat in the casing. is thus entirely over Wme. f an It willbe understood that my. machine is completely symmetrical, and will-operate 1 equally well in either direction .ot rotation; It will also be understood that byrconnect ing either one ofthentwo flowconnections of either pumping unit tha souree of fluidf portsf f openin xro olt" .tact-a d't 'e' said anes constituting pistons "carried'fsuocessivelyfbyfsaid .rotor into a working i chambef between the ring, and 'rotor and the casing walls" intermediate the extreme, ends of-said ports.

under ressure, itfwill function as a motor parts describedas constituting" the blower maybe so qonneetedtofunction as a com- 'pressedair or'steam, engine to'drive the oil and drive the power shaft. For instance the ump, orthe parts described'as constituting Jthe oil pump maybeconnected to function-- as a wa er-1 o -"otherlhii'd; motor to drive the blower. 1

1 In a'fiuidxpressurc engine,a stationary cl0s'ed casing;' .a' ring -rotatably mounted within-said casing and having. an internal cylindrical face,-a rotor having a cylindri cal faceof lesser idiameter than the internal in the ring an 'contacting'iits inner face, a plurality ofvanesfof'the same width as said ring slidingly "mounted in said rotor, one of said vanes beingpivoted to said ring and saidl casing beingjiformed withflinlet and outlet .lfiow passages?terminating severally Ibetweensaid'ring and: l

o posite iilesief iheir use of con- 2.51m afluid ressure engine, a stationary closedcasing, "a' j ringrotatably mounted as a separate unit. One ring andjits van'e'sj willbe accelerating while the other is SlOW-f' ing down, and vice versa, and the vibration.

withinsaid casing and having an internal cylindrical face, i a. rotor having-a cylindrical face of lesserdiameter'than the internal face 'of 'the'ring, said rotorhaving at one end at least a portion extending beyond the plane'of the corresponding, end of. the ring and rotatably mountedin the casing and said rotor being-mounted eccentrically with- .in the ring amicontacting its inner face,

a pair of vanes of the same width as said ring slidingly mounted insaid rotor diametrically'thereof, one of said-vanes being pivoted'to said .-..ring and said casing being 3. In a fluid pressure engine, a stationary closed casing, a' iring rotatably mounted within said casing and haying an internal cylindrical face, a rotor havin a cylindricalface; ofle'sser diameter than the internal ,f acejof thering, said-rotor having portions extending beyond the planesofthe ends of thering :and'j'ournaled in bearing seats: inv the casing and said rotor being mounted ec--' form 'with'inlet. andfoutlet'fiow passa es centriea lly'J within theiing and contacting its 'innerja'ce, a plurality of vanesof the same width-'as'the ring slidingly mounted insaid rotor, one of said vanes being pivoted" said-;ring and' said casing being "flteri'n ating severally in ports opening e aid ring and rotor on opposite sides v "f'pistons carried successively by said rotor-into a working chamber between the ring-and rotor and easing walls intermedi ate the extreme ends of said ports.

I 41 In" affluidpressure engine according to! rmember of 't-he'same -width as the ring, and

claim- 1", a-casing including a main-body a pair'l'of casing members secured to said -,body-.me'mberson opposite sides thereof, at

least'oiie of said. pairof casing members-being formed with flo'w' passages terminating at the. port'openings between the-ring and v rotor.

5." In a fluid pressure engine according to I claim 3,-"afcasing including a main body meinbeifof the same widthas the ring, and

Jafpaii' of casing II IQmbGiSSBCHIGCl to said.

bodyjmem'bers on opposite sides thereof,.the'

,, 'tei'ing opposite flow passages terminatingaat ,oppositeport openin V rotor-andalso being Formed with the bearing Y .body; member being formed with flow con-- ,nectionsjand cross' passages, and Sal-(l pair .o'f leasing members being formed with regis- "s between the. ring and seats in which the rotor is journaled.

6. Iii-a machineflof the character set forth,

a stationary cylindrical casing equipped with a-fremovable cap-platehaving its inner face provided-with, inlet and outlet ports,

.the body of said casing having inlet and outlet passages therethrough provided with orifices registering with the ports of said cap-plate, a rotary sleeve member and a rotary core member journaled in ,saidcasing in eccentric relation and contacting. with each other, and a vane pivotally connected with said sleeve member and slidable. in a slot in sleeve member.

ne of contact and said vanes con-' I said core member, the ports in said cap-plate extending across the end: surface of said ,7.,In a device oi the character set forth,

a casing comprising a'n'opemende'd annular body member formed with flow passages opening at one end of {said body iiember,

a cap-plate for said body member having its inner surface provided with ports registering with the flow passages vopening at said end of such body-.niember, an inter- .mediate body member on the other end of' said' annular body member provided with a tubular extension equipped with'inlet and outlet passages having port openings at-the end surfaces of the tubular extension, a re movable end-cap secured to .saidtubular ex tension and providing a cylindrical bearing, a sleeve ournalled in said bearing, a sleeve.

journalled in saidannular body member, a-

vane pivotallyconnected with-each of said sleeves, ashaft having rotor members eccen-. trically located with respect to said sleeves and severally contacting therewith, said cores having slots receiving said vanes.

8. a machine of the character set forth, a stationary cylindrical casing equipped.

with a removable cap-plate liavingits inner- 'face' provided with inlet and outlet ports,-

the body of said casing having inlet and outlet passages therethroughj provided with orifices registering with, the ports of said cap-plate,'a rotary sleevestructure and a 1'0- tary core member slotted in a diametrical directionand mounted in said casing in ec- MAR IN AUGUST SEAHOLM. 

